<!DOCTYPE html>
<html lang="en">

<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
    <script src="https://cdn.bootcdn.net/ajax/libs/socket.io/4.0.1/socket.io.js"></script>
    <script defer src="app.js"></script>
    <script defer src="ws.js"></script>
</head>

<body>
    <ul>
        <li></li>
    </ul>

    <input type="text" placeholder="message">
    <button>send</button>
</body>

</html>